Evaluating effects of drought stress and bio-fertilizer on quantitative and qualitative traits of valerian (valeriana officinalisl.)

Biofertilizers as Strategies to Improve Photosynthetic Apparatus, Growth, and Drought Stress Tolerance in the Date Palm

“…Our data indicated that the concentrations of soluble sugars and protein in leaves increased during drought stress in treated plants as compared to microbes-free controls. These results are in agreement with previous reports using AMF or PGPR (Abbaspour et al, 2012;Vurukonda et al, 2016;Javan Gholiloo et al, 2019). In fact, PGPR were shown to secrete osmolytes to mitigate drought stress, which act synergistically with plants internal osmolytes boosting plant growth (Paul et al, 2008).…”

“…Previous studies demonstrated that date palm and other plants inoculated with AMF accumulated more N and P in leaves than non-mycorrhizal plants when subjected to drought stress (Meddich et al, 2015c;Hao et al, 2019). Javan Gholiloo et al (2019) showed that the application of biofertilizers (AMF and PGPR) improve the P and N nutrition and consequently enhances date palm plant growth under deficit conditions. Nadeem and colleagues (2014) showed that AMF and PGPR can regulate mineral nutrition by solubilizing nutrients in the soil and producing plant growth regulators (i.e., hormones).…”

“…The (co)inoculants of PGPR and/or AMF can advance the nutrient use efficiency of fertilizers (Adesemoye et al, 2009). Moreover, AMF and/or PGPR inoculation could mitigate the detrimental effect of stresses through the enhancement of photosynthetic efficiency, overproduction of antioxidant enzymes and/or non-enzymatic antioxidants, and/or activation of the mycorrhizal induced resistance (MIR) mechanism by bypassing plant defense (Pozo and Azcón-Aguilar, 2007;Bompadre et al, 2014;Nadeem et al, 2014;Pieterse et al, 2014;Gusain et al, 2015;Lenoir et al, 2016;Duo et al, 2018;Javan Gholiloo et al, 2019). Although PGPR and AMF are commonly applied as beneficial microorganisms in agriculture and several studies have been devoted to studying the influence of this symbiosis on the plant response to abiotic stress, the mechanisms responsible for increased plant tolerance to stress have yet to be fully elucidated.…”

Effects of Nitroxin and arbuscular mycorrhizal fungi on the agro-physiological traits and grain yield of sorghum (Sorghum bicolor L.) under drought stress conditions

“…This has been confirmed by the results of the previous research [11]. The results of Javan Gholiloo et al [20] also show that the interaction effect of Mycorrhiza, Azotobacter and Azospirillum increases the proline and valerian tolerance to drought stress.…”

“…Some studies have shown synergistic microbial interactions between rhizobacteria and AMF in the growth of plants. In an extensive study, Javan Gholiloo et al [20] reported that the synergistic relationships between mycorrhiza, Azotobacter and Azospirillum have a positive effect on the growth and tolerance of valerian to drought stress. Their results showed that the interaction effect of both factors on the root and shoot dry weight, proline, carotenoids, nitrogen and potassium and essential oils were significant.…”